<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input
            placeholder="请输入内容"
            v-model="queryInfo.query"
            clearable
            @clear="getGoodList"
          >
            <el-button slot="append" icon="el-icon-search" @click="getGoodList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="goAddPage">添加商品</el-button>
        </el-col>
      </el-row>

      <!-- table 表格区域 -->
      <el-table :data="goodslist" border stripe>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="商品名称" prop="goods_name"></el-table-column>
        <el-table-column label="商品价格(元)" prop="goods_price" width="70px"></el-table-column>
        <el-table-column label="商品数量(件)" prop="goods_number" width="70px"></el-table-column>
        <el-table-column label="商品重量(kg)" prop="goods_weight" width="70px"></el-table-column>
        <el-table-column label="创建时间" prop="goods_time" width="160px">
          <template slot-scope="scope">
            {{scope.row.add_time | dateFormat}}
          </template>
        </el-table-column>
        <el-table-column label="操作" width="180px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditList(scope.row.goods_id)">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeById(scope.row.goods_id)">删除</el-button>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[5, 10, 15, 20]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
        background
      >
      </el-pagination>
    </el-card>
    <!-- 修改用户对话框 -->
    <el-dialog
      title="修改商品"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        ref="editFormRef"
        :model="editForm"
        label-width="80px"
      >
        <el-form-item label="商品名称">
          <el-input v-model="editForm.goods_name"></el-input>
        </el-form-item>
        <el-form-item label="商品价格">
          <el-input v-model="editForm.goods_price"></el-input>
        </el-form-item>
        <el-form-item label="商品数量">
          <el-input v-model="editForm.goods_number"></el-input>
        </el-form-item>
        <el-form-item label="商品重量">
          <el-input v-model="editForm.goods_weight"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editListInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 查询参数对象
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 10
      },
      // 商品列表
      goodslist: [],
      // 总数据条数
      total: 0,
      // 控制编辑商品的对话框
      editDialogVisible: false,
      // 查询到的商品信息对象
      editForm: {}
    }
  },
  created() {
    this.getGoodList()
  },
  methods: {
    // 根据分页获取对应的商品列表
    async getGoodList() {
      const { data: res } = await this.$http.get('goods', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败')
      } else {
        this.goodslist = res.data.goods
        this.total = res.data.total
        console.log(this.goodslist)
      }
    },
    // 监听pagesize发生改变
    handleSizeChange(newPageSize) {
      this.queryInfo.pagesize = newPageSize
      this.getGoodList()
    },
    // 监听pagenum发生改便
    handleCurrentChange(newPageNum) {
      this.queryInfo.pagenum = newPageNum
      this.getGoodList()
    },
    // 点击编辑按钮
    async showEditList(id) {
      const { data: res } = await this.$http.get('goods/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询商品信息失败')
      } else {
        this.$message.success('查询商品信息成功')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听添加用户对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 点击确认,修改用户表单的提交
    editListInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) {
          return 0
          // 发起编辑商品信息的数据请求
        } else {
          const { data: res } = await this.$http.put('goods/' + this.editForm.goods_id,
          {
            goods_name: this.editForm.goods_name,
            goods_price: this.editForm.goods_price,
            goods_number: this.editForm.goods_number,
            goods_weight: this.editForm.goods_weight
          })
          console.log(res.data)
          if (res.meta.status !== 201) {
            return this.$message.error('商品信息修改失败')
          } else {
            this.editDialogVisible = false
            this.getGoodList()
            this.$message.success('商品信息修改成功')
          }
        }
      })
    },
    // 点击确认，删除商品
    async removeById(id) {
      const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      } else {
        const { data: res } = await this.$http.delete(`goods/${id}`)
        if (res.meta.status !== 200) {
          return this.$message.error('删除商品失败')
        } else {
          this.$message.success('删除商品成功')
          this.getGoodList()
        }
      }
    },
    // 点击去往添加商品的页面
    goAddPage() {
      this.$router.push('/goods/add')
    }
  }
}
</script>

<style lang="less" scoped>
</style>
